A short production run (~1 km) of 3 mm polycaprolactone (PCL) filament suitable for use in the Mk II extruders used in several operational and near-operational reprap prototypes has been produced for the project.

With 1 km of polycaprolactone filament, the project has been able to produce larger artifacts and also test the candidate systems for days instead of for hours, as was the case with hand-produced filament.